diff --git a/README.md b/README.md
index ea7368d..e17e2b8 100644
--- a/README.md
+++ b/README.md
@@ -14,11 +14,11 @@ usage: `mono SerialPcap.exe [options] <portName>`
 Option | Description
 ------ | -----------
 `-b, --baud=VALUE` | Serial port speed (default 9600)
-`-y, --parity=VALUE` | o (=odd), e (=even), n (=none) (defaul none)
-`-p, --stopbits=VALUE` | 1, 2 (defaul 1)
+`-y, --parity=VALUE` | o (=odd), e (=even), n (=none) (default none)
+`-p, --stopbits=VALUE` | 1, 2 (default 1)
 `-g, --gap=VALUE` | Inter frame gap in miliseconds (default 10)
 `-d, --dlt=VALUE` | Data link type in pcap format (default 147)
-`-o, --output=VALUE` | Output file prefix (defalut port name)
+`-o, --output=VALUE` | Output file prefix (default port name)
 `--pipe` | Use named pipe instead of file
 `-h, --help` | Show this message and exit